I wanted to file this on your github page but the issues tab is not available. When using your latest version of TF-A (https://github.com/STMicroelectronics/arm-trusted-firmware/releases/tag/v2.8-stm32mp-r1.1) self-signing (TRUSTED_BOARD_BOOT=1 ROT_KEY=privateKey.pem GENERATE_COT=1) for some reason does not work with mbedtls version > 2.28.2. Latest LTS version is 2.28.5 i tried all versions down from .5 - . 2 The board wont boot I get error -80 ie. Authentication error I'm using buildroot 2023.2.6 Just so you guys know. 🙂 Cheers !